- Companies
- Electricians
- Hemel Hempstead
- Sia Engineering Services Ltd
Sia Engineering Services Ltd
- Company number
- 10430989
- Incorporated
- 17 Oct 20169 years trading
- Registered office
- 45 Hill Common, Hemel Hempstead, HP3 8JH
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation; Other construction installation; Other engineering activities
Sia Engineering Services Ltd is a 9-year-old private limited company registered in Hemel Hempstead, company number 10430989, one of 127 electrical contractors in Hemel Hempstead. Its next accounts are due at Companies House on 31 October 2026, and its first CT600 is due at HMRC on 31 October 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £2,247 (+19.8%) on the year before, to £14K.
- Net assets rose in 3 of 7 year-on-year comparisons on record.
- Current assets of £14K against £1,283 owed within a year: more than 10 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 8 years, 2017 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2024 | £14K | £5,743 | £14K | £1,283 | 0 |
| 31 Oct 2023 | £11K | £5,508 | £15K | £3,175 | 0 |
| 31 Oct 2022 | £7,861 | £8,411 | £14K | £5,749 | 0 |
| 31 Oct 2021 | £1 | £0 | |||
| 31 Oct 2020 | £1 | £1 | 0 | ||
| 31 Oct 2019 | £1 | £1 | 0 | ||
| 31 Oct 2018 | £1 | £1 | |||
| 31 Oct 2017 | £1 | £1 |
Where Sia Engineering Services Ltd is registered
The registered office is in Hemel Hempstead (HP3), in the Dacorum local authority area, East of England. Show HP3 8JH on a map.
Other trade companies in HP3
- G-Force Plumbing & Heating Contractors LimitedPlumbers and heating engineers
- Primeline Property Solutions LtdRoofers
- Elite Roof Repairs LtdRoofers
- Connor Air LimitedPlumbers and heating engineers
- Irv Services LtdInstallers
- Herts Number Plates LtdMotor traders
- RH Design and Electrical LtdBuilders
- Ejc Plumbing LtdPlumbers and heating engineers
Also registered at this address
1 other company uses the same registered office as Sia Engineering Services Ltd.
- Sia Air Solutions LtdMachinery repair and installation
What happens if Sia Engineering Services Ltd files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 10430989
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 October 2016 (9 years ago)
- Registered office
- 45 Hill Common, Hemel Hempstead, HP3 8JH
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220)
Other construction installation (SIC 43290)
Other engineering activities (SIC 71129) - Year end
- 31 October (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 October 2024
- Last confirmation statement
- 15 September 2026
- Previous names
- Remp Computers Ltd (until 5 May 2022)
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Hemel Hempstead
Other active electrical contractors registered in Hemel Hempstead.
- Smiley Electrical Limited2019
- Solas Electrical Ltd2017
- Sparc Electrical Limited2004
- Steve Power Electrical Services Ltd2025
- Structure Works International Limited2017
- Stuntsort Limited1987
- Subcity Property Services Ltd2013
- Switched Electrical Ltd2022
All electrical contractors in Hemel Hempstead · All trades in Hemel Hempstead · Electricians across the UK
Frequently asked questions
When are Sia Engineering Services Ltd's accounts due?
Sia Engineering Services Ltd's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is Sia Engineering Services Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 October 2025, due by 31 October 2026, and one for the period to 31 January 2026, due by 31 January 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Sia Engineering Services Ltd still trading?
Sia Engineering Services Ltd is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Sia Engineering Services Ltd do?
Sia Engineering Services Ltd is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220); Other construction installation (SIC 43290); Other engineering activities (SIC 71129).
How old is Sia Engineering Services Ltd?
Sia Engineering Services Ltd was incorporated on 17 October 2016, 9 years ago.
What is the penalty if Sia Engineering Services Ltd files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Sia Engineering Services Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.